diff --git a/.gitignore b/.gitignore
index 7e783a8..609ea03 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+config.yaml
+log 
+
 # ---> Python
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/README.md b/README.md
index 97e5d14..0ba6d83 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,63 @@
-# Sludge: webthing for natalieee.net
+# sludge: webthing for natalieee.net
 it rhymes with kludge.
 
+## config
+```yaml
+ssl-key: ./key.pem
+ssl-cert: ./cert.pem
+http-port: 5000 
+https-port: # 5001
+file-dir: 'site'
+```
+ssl-{cert,key} are self explanatory.
+if the value of https? port is commented or not present, it will not run the https? server on that port.
+file-dir is where the files for the site can be found. 
+the above config is the config for the local version of my website, which is used for testing.
+it runs an http server on 5000, but no https server.
+
+## serving files 
+- src/lib/router.py has the routing config for my website in it. it is easy to modify to your usecase.
+- src/lib/patchers.py has the patching config for my website in it. it is also easy to modify.
+
+## dynamic content
+### embedded bash scripting 
+sludge has support for inline bash inside of html documents.<br>
+ex:
+```html
+<p>lorem ipsum $[echo foo]</p>
+```
+would resolve to 
+```html 
+<p>lorem ipsum foo</p>
+```
+
+### variables in html 
+in addition to the above, you can have variables embedded in html.
+```html 
+<p>lorem ipsum {aoeu}</p> 
+```
+would normally resolve to
+```html 
+<p>lorem ipsum {aoeu}</p> 
+```
+however, if we assume that this text is in a file `foo.html`, then we can serve that file such that
+```py 
+parse_file('./foo.html', dict(aoeu='foo'))
+```
+in which case it would resolve to 
+```html
+<p>lorem ipsum foo</p>
+```
+<br>
+in practice, this may be seen here:
+```py
+Route(
+    lambda path: os.path.isdir('.' + path.path), 
+    [Method.GET],
+    lambda request, *_: Response(
+        ResponseCode.OK, 
+        {'Content-Type': 'text/html'},
+        parse_file('./dir_index.html', dict(path='.' + request.path.path)).encode('utf-8')
+    )
+)
+```
diff --git a/src/lib/content.py b/src/lib/content.py
index e088750..8dda7cb 100644
--- a/src/lib/content.py
+++ b/src/lib/content.py
@@ -45,8 +45,7 @@ def remove_html_tags(input_string: str) -> str:
 
 def error_page(code: int) -> Response:
     type = ResponseCode(code)
-    print('error page called')
-    aoeu= Response(
+    return Response(
         type, 
         {'Content-Type': 'text/html'},
         parse(f'''
@@ -61,8 +60,6 @@ def error_page(code: int) -> Response:
         </html>
         ''').encode('utf-8')
     )
-    print(aoeu)
-    return aoeu
 
 def page(title, body): 
     return parse("""         
diff --git a/src/lib/logger.py b/src/lib/logger.py
new file mode 100644
index 0000000..3b77d67
--- /dev/null
+++ b/src/lib/logger.py
@@ -0,0 +1,22 @@
+import logging 
+
+log = logging.getLogger()
+
+log.setLevel(logging.DEBUG)
+
+formatter = logging.Formatter('%(asctime)s | %(name)s | %(threadName)s | %(levelname)s: %(message)s')
+
+file_logger = logging.FileHandler('log')
+stream_logger = logging.StreamHandler() 
+
+file_logger.setLevel(logging.DEBUG)
+stream_logger.setLevel(logging.INFO)
+
+file_logger.setFormatter(formatter)
+stream_logger.setFormatter(formatter)
+
+log.addHandler(file_logger) 
+log.addHandler(stream_logger)
+
+log.info('log initialized')
+
diff --git a/src/lib/patchers.py b/src/lib/patchers.py
index babb8be..de5e1a9 100644
--- a/src/lib/patchers.py
+++ b/src/lib/patchers.py
@@ -86,5 +86,10 @@ patchers: List[Patcher] = [
         response.code, 
         response.headers,
         uwuify(response.body).encode('utf-8')
-    ) if 'text/html' in response.headers.values() and is_subdict({'uwu': 'true'}, request.path.params) else response
+    ) if 'text/html' in response.headers.values() and is_subdict({'uwu': 'true'}, request.path.params) else response,
+        lambda response, request: Response(
+        response.code, 
+        response.headers,
+        re.sub(r'sludge', lambda match: 'sludge' + ' (/&#x73;&#x6c;&#x28c;&#x64;&#x361;&#x292;/)' if random.randint(0, 5) < 1 else 'sludge', response.body.decode('utf-8')).encode('utf-8')
+    ) if 'text/html' in response.headers.values() else response
 ]
diff --git a/src/lib/request.py b/src/lib/request.py
index 24d3847..68728d0 100644
--- a/src/lib/request.py
+++ b/src/lib/request.py
@@ -5,6 +5,7 @@ from .path import Path
 from .headers import Headers 
 from .body import Body
 from .router import routes
+from .logger import log
 
 @dataclass
 class Request:
@@ -43,12 +44,13 @@ class Request:
         body_start = request_str.find('\r\n\r\n') + 4
         body = Body(request_bytes[body_start:], headers.get('Content-Type') or 'text/plain')
 
+        log.info(f'received request for {path.path} from {headers.get('X-Real-IP')}')
         return cls(method, path, version, headers, body)
 
     def match(self):
         for route in routes: 
-            if route.matches(self): 
-                print(route)
+            if route.matches(self):
+                log.debug(f'matched {self} with {route}')
                 return route
 
     def __repr__(self):
diff --git a/src/lib/response.py b/src/lib/response.py
index bab79b5..bbd271b 100644
--- a/src/lib/response.py
+++ b/src/lib/response.py
@@ -1,6 +1,7 @@
 from socket import socket
 from typing import Dict
 from .responsecodes import ResponseCode
+from .logger import log 
 
 class Response:
     def __init__(self, code: ResponseCode, headers: Dict[str, str], body: bytes):
@@ -16,6 +17,9 @@ class Response:
         )
 
     def send(self, client: socket) -> None:
-        print(self)
+        log.debug(f'sending {self} to {client}') 
         client.sendall(self.build_response())
         client.close()
+
+    def __repr__(self): 
+        return f'Response(code={self.code}, headers={self.headers}, body={self.body[:256]})'
diff --git a/src/lib/router.py b/src/lib/router.py
index 51c62ff..5a9cbcb 100644
--- a/src/lib/router.py
+++ b/src/lib/router.py
@@ -8,7 +8,9 @@ from .response import Response
 from .responsecodes import ResponseCode
 from .content import *
 from .patchers import patchers
+from .logger import log
 import os
+import traceback
 
 @dataclass
 class Route: 
@@ -28,7 +30,7 @@ class Route:
             return response
 
         except Exception as e:
-            print(e)
+            log.error(tracebark.format_exc)
             return error_page(500)
 
     def matches(self, request: 'Request') -> bool:
@@ -46,7 +48,6 @@ routes = [
                 [
                     (lambda form_data: ( 
                         (lambda time: (
-                            print('\n\nFORM DATA!!!!',form_data,request, '\n\n'),
                             f:=open(f'./files/posts-to-homepage/post_{time}.txt', 'w'),
                             f.write(f"<i style='font-family: MapleMonoItalic'>{form_data['name']}</i>@{time}<br>{form_data['text']}<br><br>"),
                             f.close()
@@ -60,7 +61,7 @@ routes = [
                     parse_file('./home.html').encode('utf-8')
                 ][1]
             ))
-        ) if len(request.body.data) > 0 or request.method != Method.POST else error_page(ResponseCode.BAD_REQUEST)
+        ) if len(request.body.data) > 0 or request.method != Method.POST else error_page(400)
     ),
     Route(
         lambda path: os.path.isdir('.' + path.path), 
diff --git a/src/lib/server.py b/src/lib/server.py
index e115af3..ec4a6d7 100644
--- a/src/lib/server.py
+++ b/src/lib/server.py
@@ -1,21 +1,30 @@
 import socket
 import threading
+import traceback
 from typing import Callable
 
+from .logger import log
+
 def serve(address: str, port: int, callback: Callable, wrapper: Callable[[socket.socket], socket.socket] = lambda s: s) -> None:
     server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    while True:
-        try:
-            server_socket.bind((address, port))
-            server_socket.listen(1)
-            server_socket = wrapper(server_socket)
+    log.info(f'server started on {port}')
+    try: 
+        server_socket.bind((address, port))
+        server_socket.listen(1)
+        server_socket = wrapper(server_socket)
 
-            while True:
+        while True:
+            try:
                 conn, addr = server_socket.accept()
                 client_connection = threading.Thread(target=callback, args=(conn, addr))
                 client_connection.start()
 
-        except Exception as e:
-            print(e)
-    
-        finally: server_socket.close()
+            except Exception:
+                log.warn(traceback.format_exc())
+
+    except: 
+        log.critical(traceback.format_exc())
+
+    finally: 
+        server_socket.close()
+        log.info(f'server on {port} shut down')
diff --git a/src/main.py b/src/main.py
index c31bef0..e2fa5f5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,4 +1,5 @@
 from lib import Request, serve 
+from lib.logger import log
 from typing import Tuple
 import threading
 import socket
@@ -16,7 +17,6 @@ def handle_client(client: socket.socket, addr: Tuple[str, int]) -> None:
 
     while (data := client.recv(1024)):
         request += data
-        print(len(data), data)
 
         if len(data) < 1024: break
 
@@ -25,6 +25,8 @@ def handle_client(client: socket.socket, addr: Tuple[str, int]) -> None:
         .execute(request, client, addr) \
         .send(client)
 
+    log.info('destroy thread')
+
 def main() -> None:
     http_thread = threading.Thread(name='http', target=serve, args=('0.0.0.0', config['http-port'], handle_client))
     https_thread = threading.Thread(name='https', target=serve, args=('0.0.0.0', config['https-port'], handle_client), kwargs=dict(wrapper=lambda socket: [